Checking timber for wind (twist)

When we are making cabinets, doors, windows and other joinery items withtimber we need to mcheck the timber for square striagth and twist.
Twist is especially important because while a piece of material make check out with square edges at severla locataions along the length, it may infact have twist in it. Twisted timber means twisted fames that means a twisted construction. we always try and start a project withthe best quality materials possible and this means timber that is true straight and square.
We can check for square with a combination square and we can check for straight with a straight edge but for twistUsing_winding_sticks.JPG
we can use winding sticks.

Watch this short clip to see how they work.